Ammonia-still.



No. 792,379. PATENTED JUNE 13, 1905.

- H. A. ABENDROTH.

AMMONIA STILL.

APPLICATION FILED OCT. 3- 1904.

a MIMI-Ink ,NrrE ST Patented June 13, 1905.

HERRMANN ARTHUR ABENDROTH, OF BERLIN, GERMANY.

AMMONIA-STILL.

SPECIFICATION forming part of Letters Patent No. 792,379, dated June 13,1905.

Application filed October 3, 1903. Serial No. 175,571.

.To all whom, it ptmy concern.-

Be it known that 1, HERRMANN ARTHUR ABENDROTH, a subject of the GermanEmperor, andaresident of Berlin. Germany, have invented a new andImproved Ammonia-Still, of which the following is a full, clear, andexact description.

The invention relates to ammonia apparatus or stills, substantially aswill hereinafter more fully appear.

The principal object of the invention is to provide a new and improvedammonia-still which is economical in construction and effective in useor operation.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter, and then pointedout in the claim.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is asectional side elevation of the improvement practically onthe same line of Fig. 2 on which Fig. 5 is taken. Fig. 2 is a horizontalsectional view. Fig. 3 is a sectional elevation of one of the cells onthe line 3 3 of Fig. 2. Fig. 4 is a similar view of the same on the line4: t of Fig. 2. Fig. 5 is a like view of the same on the line 5 5 ofFig. 2.

In apparatus of the class described as heretofore constructed the freeflow of the ammonia-water through the cells of the stills was frequentlyinterrupted by the water backing up from the discharge toward theinflow, so that the hoods over the steam-inlets extend deep into thewater to prevent the steam from passing uniformly from the hood throughthe surrounding water into the cell, the steam then passing into thewater at the point of least resistance-that is, at the point of the hoodleast immersed in the water. To insure an even flow of the water throughthe cells and a uniform contact of the steam with the water, thefollowing improvement is provided: The superimposed cells a are providedwith the steam-inlet pipes 5, over which extend hoods c for the steam topass in an upward direction from one cell to the next one above, whilethe ammonia-water flows from one cell to the next one below by way ofthe overflow pipes d. The steam (which is derived from any suitablesource) is admitted to the cells at one or more places by means ofpipes, shown broken off at different elevations at the sides of thepreferred form of the apparatus or still in Fig. 1. Each cell a isprovided with a number of vertical partitions a to form a zigzag passagefor the ammonia-water to flow in the direction of the arrows shown inFig. 2. The bottom of each cell, as shown, is divided by the partitionsinto three sections or fields e f g, connected with each other, and eachsection or field is formed into terraces e c e e", f f f f f g g g g,and the terraces are so arranged that the lowest terrace a of the firstsection or field 6 is adjacent to the highest terrace f of the nextsection or field f, the lowest terrace f is adjacent to the highest ter7 race 9 of the section or field g, and from the lowest terrace g* thewater passes by way of the overflow-pipe (Z into the next cell belowthatis, onto the terrace a of this cell. The several terraces in each cellwith the excep tion of the inflow-terrace e and the outflowterrace g areprovided with one or more steaminlet pipes b and corresponding hoods c,as will be readily understood by reference to Fig. 6. Now by thearrangement described the ammonia-water flowing by its own gravity overthe terraces, as described, is not liable to back up from the point ofoutflow (at the terrace g) to the point of inflow, (at the terrace e',)and hence the hoods on the several terraces extend uniformly deep intothe ammonia-water to insure a uniform outflow of the steam from a hoodinto the surrounding water, thus producing a contact of the steam withall the flowing water, thereby increasing the efliciency of theapparatus.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- An ammonia-still of the character described,comprising superimposed cells having inlets and outlets forammonia-water, the bottoms QT, I 792,379

of said cells being constructed to form declining sections,and eachsection being constructed of terraces declining from the point of inflowto the point of outflow of the ammonia-water, said terraces, with theexception of the highest and lowest of them, being provided withsteam-inlet pipes having hoods.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

IIERRMANN ARTHUR ABENDROTH.

Witnesses:

HENRY HAsrnR, \VOLDEMAR HAUrT.

